This pattern resize calculator helps makers adjust a pattern to a new size while keeping the same proportions. Enter the original pattern dimensions and the new desired width to calculate the resized height.
How to use calculator
Enter the original width and height of the pattern or project. Then enter the new desired width. The calculator will determine the correct proportional height needed to keep the pattern scaled evenly.
Explanation
When resizing a pattern, it is important to keep the same proportions so the design does not become distorted. This is done by calculating a scale factor, which compares the new width to the original width.
The scale factor is then applied to the original height to determine the new height.
Example math
If the original pattern is 40 × 50 inches and the new desired width is 60 inches:
60 ÷ 40 = 1.5
This means the pattern is being enlarged by 1.5 times.
Apply that scale to the height:
50 × 1.5 = 75
The resized pattern would be 60 × 75 inches.